Surname มูลศิลป์ (Munsil 
, มูลศิลป์ , Moolsin ) , globally, is a rare family name. The last name มูลศิลป์ is characteristic of Thailand, where it is a rare surname, the United States, where it is a very rare surname, and Canada. In absolute terms, it is the most numerous in Thailand, the United States, and India. Much less frequently, มูลศิลป์ is the forename as well as the last name.